Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBUICK1988SKYHAWK BASE, 4D WAGON, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSIS2.0L VIN [K] CEC TESTS W/CODES
1988 Buick Skyhawk Base, 4D Wagon, Automatic
2.0L VIN [K] CEC Tests W/Codes
1988 Buick Skyhawk Base, 4D Wagon, AutomaticSECTION 2.0L VIN [K] CEC Tests W/Codes
- Description
- Operation
- Identification
- Diagnosis & Testing
- Pre-Test Conditions
- Basic Diagnostic Procedure
- Entering Or Exiting Diagnostic Mode (Non-Scan)
- Reading Trouble Codes
- ECM Trouble Code Definitions
- Trouble Code Determination (Hard Or Intermittent)
- Clearing Trouble Codes
- Diagnostic Materials
- Diagnostic Charts
- Diagnostic Aids
- Field Service Mode Check (Fuel Injected Models)
- Special Diagnostic Tools
- Scan Tester Usage
- Scan Tester - Test Data Parameters
- Diagnostic Circuit Check
- Chart A1 - No "Service Engine Soon" Lights
- Chart A2 - No Code 12, "SES" Light Always On
- Chart A3 - Engine Cranks/Won't Run (J Body) (1 Of 2)
- Chart A3 - Engine Cranks/Won't Run (J Body) (2 Of 2)
- Chart A5 - Fuel Pump Relay
- Chart A7 - Fuel System Diagnosis (1 Of 2)
- Chart A7 - Fuel System Diagnosis (2 Of 2)
- Chart B1 - Restricted Exhaust System Check
- Code 13 - Open O2 Circuit
- Code 14 - Coolant Temperature Sensor (Cts) Signal Voltage Low
- Code 15 - Coolant Temperature Sensor (Cts) Signal Voltage High
- Code 21 - TPS Signal Voltage High
- Code 22 - TPS Signal Voltage Low
- Code 23 - Mat Sensor Temp Low
- Code 24 - Vehicle Speed Sensor (VSS) With Permanent Magnet (P.M.) Generator
- Code 25 - Mat Sensor Temperature High
- Code 32 - EGR System Error (J Body 2.0L VIN K)
- Code 33 - Map Sensor Signal Volt High
- Code 34 - Map Sensor Signal Volt Low
- Code 35 - Idle Speed Error
- Code 42 - Electronic Spark Timing (Est) (J Body)
- Code 44 - Lean Exhaust Indication
- Code 45 - Rich Exhaust Indication
- Code 51 - Faulty Prom
- Code 53 - System OVERVOLTAGE
- Chart C1A - Park/Neutral Switch A/T
- Chart C1D - Map Output Check
- Chart C1E - P/S Pressure Switch (A/J/N Body)
- Chart C4C - Ignition System Check (J Body)
- Chart C4D1 - "Dis" Misfire At Idle (A/N/P Body)
- Chart C7 - EGR Valve Check
- Chart C8 - Torque Converter Clutch
- Chart C8B - M/T Shift Light (A/J/N/P Bodies)
- Chart C10 - A/C Clutch Control (J Body)
- Chart C12 - Engine Cooling Fan (J & N Bodies)
- Component Locations & Terminal Identification
- Wiring Diagrams
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.